Throughout this part, the abbreviation BTS is used for a busbar trunking system. Where reference to IEC 61439-1: 2020 is made, the term “assembly” therefore reads as “BTS”.
This part of IEC 61439 lays down the definitions and states the service conditions, construction requirements, technical characteristics and verification requirements for low-voltage BTS (see 3.101).
This document applies to BTS as follows:
• BTS for which the rated voltage does not exceed 1 000 V AC or 1 500 V DC;
• BTS designed for a nominal frequency of the incoming supply or supplies not exceeding 1 000 Hz;
NOTE 1 Frequencies above 1 kHz are considered as high frequencies, see also IEC 60664 -1: 2020, 5.3.3.2.5 to take into account additional constraints to insulation coordination.
• BTS intended for indoor and outdoor applications;
• BTS intended for use as stationary assemblies with or without an enclosure ;
• BTS intended for use in connection with the generation, transmission, distribution and conversion of electric energy, and for the control of electric energy consuming equipment;
• BTS designed for use under special service conditions, for example in ships, in Railway applications - Rolling stock equipment -, or operated by ordinary persons, provided that the relevant specific requirements are complied with;
NOTE 2 Supplementary requirements in ships are covered by IEC 60092-302-2: 2019;
NOTE 3 Supplementary requirements in Railway applications – Rolling stock equipment – are covered by IEC 61373: 2010;
NOTE 4 Supplementary requirements for ordinary persons are covered by IEC 60364-4-41: 2017 and IEC 60898 series.
This document provides supplementary requirements for BTS intended for use as part of the electrical equipment of machines and can be applied in addition to the requirements given in IEC 60204-1: 2021.
This document applies to all BTS whether they are designed, manufactured and verified on a one-off basis or fully standardized and manufactured in quantity.
The manufacture and/or assembly may be carried out by a manufacturer other than the original manufacturer (see 3.10.1 and 3.10.2 of IEC 61439-1: 2020).
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